Teledyne 3000 Ultra Trace - PPB oxygen analyzer - Manual (Page 31)

Ultra Trace Oxygen Analyzer Installation 3
3-9 Teledyne Analytical Instruments
Figure 3-5: Remote Probe Connections
The voltage from these outputs is nominally 0 V for the OFF and
15 V dc for the ON conditions. The maximum combined current that can be
pulled from these output lines is 100 mA. (If two lines are ON at the same
time, each must be limited to 50 mA, etc.) If more current and/or a different
voltage is required, use a relay, power amplifier, or other matching circuitry
to provide the actual driving current.
In addition, each individual line has a series FET with a nominal ON
resistance of 5 ohms (9 ohms worst case). This can limit the obtainable
voltage, depending on the load impedance applied. See Figure 3-6.
Figure 3-6: FET Series Resistance